👉 Wan fumes refer to a lingering, often unpleasant odor or haze that persists in the air, typically after a significant event or source has been removed but not fully cleared. This can occur in various settings, such as after a fire, when chemicals are used in manufacturing, or even from prolonged exposure to certain pollutants. The term "wan" suggests a gradual, almost invisible presence, making it difficult to detect immediately but deeply affecting the air quality and, consequently, the comfort and health of those around it. These fumes can linger for hours or even days, impacting indoor environments and outdoor spaces, and often requiring thorough cleaning or ventilation to dissipate.